EXERCISE 49 A 

 DOES WATER EVAPOEATE FROM A PLANT? 



Materials. A large, wide-mouthed bottle ; some fresh leaves or a short, leafy branch ; materials 

 arranged as in Fig. 62 of the " Elements of General Science." 



Directions. If it is not desired to measure evaporation from a plant as in the preceding exercises, 

 a simpler experiment may be used. Inclose several leaves (or a short, leafy branch) in a bottle without 

 removing them from the plant. Close the mouth of the bottle with a split cork stopper, through 

 which the branch or petioles pass, or plug the opening with cotton. Support the bottle in any 

 convenient way and set the whole apparatus in a light place. 



In about half an hour examine the bottle and explain the results. 



[68] 



